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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
What? Well, yes, that's true, but I didn't write this one. Just pointed out that shortcoming.
You have to add test cases
Not quite - "A man, a plan, a canal, Panama" won't work with this method. "racecar" will work as long as it isn't capitalized. It will need to ignore spaces, punctuation, and capitalization.
Very good! Much better than my own fork.